Checkfit vs StrongLifts 5x5.
StrongLifts runs one fixed program; Checkfit writes one that adapts. StrongLifts is a single beginner barbell routine. Checkfit is a hypertrophy mesocycle calibrated to you and built to keep working after linear progression dies.
What StrongLifts does well
The 5x5 method is battle-tested for absolute beginners. The app guides you through five compound lifts — squat, bench, row, overhead press, deadlift — with the simplest possible progression: add 5lb every session until you stall. The core program is free; a Pro tier unlocks the rest. For someone with a barbell and zero training history, it's a clean place to start.
Why lifters choose Checkfit
StrongLifts is one program, forever. The same five lifts, the same linear jumps, no accessories by default, and a barbell required. Linear progression works — until it doesn't, which for most lifters is within a few months. After that, "add 5lb every session" just means stalling on schedule.
Checkfit picks up where 5x5 leaves off. It calibrates a six-week hypertrophy mesocycle to your current strength, includes accessory work alongside the compounds, manages your volume, schedules deloads, and progresses with RIR-based math instead of a flat 5lb. It works with any equipment — barbell, dumbbells, machines, cables — not just a loaded bar.
And it covers the part 5x5 never touched: daily calorie and protein targets are built in, with an optional coach connection on top. StrongLifts teaches you to lift; Checkfit programs the muscle-building and the nutrition behind it.
Nutrition the others don't have
StrongLifts will tell you to eat big and leave it there. There's no calorie target, no protein goal, no food log — yet on 5x5 the recomposition lives and dies on whether you actually eat enough. Checkfit builds that into the same app: a daily calorie and protein target, and a logger to hit it. Search a food, add it, and the running total moves toward your number, so a bulk is a plan you can hold to and a cut is a deficit you can see.
Training and eating come in one subscription, not a free 5x5 app plus a separate macro tracker. See how nutrition works.
At a glance
| Checkfit | StrongLifts | |
|---|---|---|
| Program type | Adaptive 6-week mesocycle | Fixed 5x5 linear |
| Progression | RIR-based, calibrated | Add 5lb per session |
| Equipment | Any setup | Barbell required |
| Calorie & protein targets | Included | None |
| Food logging | Built in | None |
| Coach connection | Included | None |
| Price | $17/mo, all in | Free or paid Pro |
The verdict
If you're a true beginner with a barbell and want the simplest possible first program, StrongLifts is a fine place to start — and it's free. But it has a short shelf life. Once linear progression stalls, or if you don't have a barbell at all, Checkfit picks up the slack: an adaptive program, any equipment, plus calorie and protein targets and a food logger — all in one $17/mo subscription. Get Checkfit.
